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THE KNEE Tim Amshoff Moore Traditional School Applied Sports Medicine

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WHAT SHOULD I BE ABLE TO DO? Student will learn the evaluation process of using HOPS (History Observation Palpation Special Tests). Student will learn the evaluation process of using HOPS (History Observation Palpation Special Tests). Student will learn how to perform the orthopedic special tests for determining the nature of injury. Student will learn how to perform the orthopedic special tests for determining the nature of injury.

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KNEE EVALUATION Knees are what is always seen and determined to be most serious. Knees are what is always seen and determined to be most serious. Check out the video on cteonline.org Check out the video on cteonline.org

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ANATOMY OF THE KNEE

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LOOK AT IT THIS WAY

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MUSCULAR ANATOMY

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QUAD MUSCULATURE VMO VMO VLO VLO Rectus femoris Rectus femoris

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SO, WHAT KIND OF INJURIES DO WE LOOK FOR? Chronic Chronic Degeneration; results in replacement of joints Degeneration; results in replacement of joints syndromes syndromes Overuse Overuse Tendinitis Tendinitis bursitis bursitis Acute Acute Sprains/strains dislocations/fractures Sprains/strains dislocations/fractures contusions contusions

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SO, LETS TRY IT OUT On the next slide you are going to see how we check for joint stability (ligaments). Look at it close. This is what you will try on your partner and be checked for competency. On the next slide you are going to see how we check for joint stability (ligaments). Look at it close. This is what you will try on your partner and be checked for competency.

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QUAD MUSCULATURE VMO- terminal extension VMO- terminal extension VLO VLO VIO VIO Rectus femoris Rectus femoris

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THE KNEE HISTORY Pain Pain Contact vs noncontact Contact vs noncontact Effusions Effusions Mechanical symptoms Mechanical symptoms Locking Locking Instability (falls) Instability (falls) Initial treatment Initial treatment

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THE KNEE HISTORY Continue work/play? Continue work/play? Medications Medications Occupation/Sport Occupation/Sport Time tables Time tables

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PFA-HISTORY Theatre sign- pain with prolonged sitting (as in theatre or planes) Theatre sign- pain with prolonged sitting (as in theatre or planes) Pain with stairs

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PHYSICAL EXAM OF THE KNEE Inspection Inspection Palpation Palpation Range of Motion Range of Motion Special tests Neurovascular assessment

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INSPECTION Effusion Effusion Joint swelling Joint swelling Ecchymosis Ecchymosis discoloration discoloration Edema Edema Localized swelling Localized swelling Q angle Angular deformities Muscular asymmetry

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PALPATION ANTERIOR Tibial tubercle Tibial tubercle Infrapatellar tendon Infrapatellar tendon Quad insertion Quad insertion Crepitus ? Crepitus ? MEDIAL MCL Meniscus Tibial plateau Femoral condyle

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PALPATION LATERAL LATERAL Head of the fibula Head of the fibula LCL LCL Meniscus Meniscus Tibial plateau Tibial plateau Femoral condyle Femoral condyle Gerdys tubercle Gerdys tubercle POSTERIOR Menisci (posterior horns) Popliteal fossa Hamstring tendons

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GRADING LIGAMENT INJURIES

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ACL SPECIAL TESTS Anterior drawer Anterior drawer Lachman test Lachman test Pivot shift test Pivot shift test Valgus stress test at full extension! Valgus stress test at full extension!

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REMEMBER ACL injuries happen when ACL injuries happen when no one is around (no contact) no one is around (no contact) There is sudden deceleration There is sudden deceleration Pop or snap is felt Pop or snap is felt Effusion in first 12 hours Effusion in first 12 hours Blood is aspirated form joint Blood is aspirated form joint

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ACL: PHYSICAL EXAM Decreased ROM Decreased ROM Effusion-hemarthrosis, immediate Effusion-hemarthrosis, immediate + Instability tests + Instability tests Lachman: most accurate Lachman: most accurate Pivot shift Pivot shift Anterior drawer Anterior drawer + MCL and meniscus tests + MCL and meniscus tests

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LIGAMENT EXAM Translation + ENDPOINTS!

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+ PIVOT SHIFT Palpable clunk as the lateral tibial condyle reduces on the femur

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TREATMENT Trying to figure it out? Trying to figure it out?

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PARTIAL ACL TEAR > 40% ACL substance > 40% ACL substance + Lachman, - pivot shift + Lachman, - pivot shift Clinically Clinically Most behave functionally as full tears Most behave functionally as full tears Continued shifting s risk of meniscus damage Continued shifting s risk of meniscus damage Rx as full tear Rx as full tear

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ACL TREATMENT Surgical or Nonsurgical ? modify activity ? modify activity RICE RICE Hamstrings, gastroc! Hamstrings, gastroc! Functional bracing ? Functional bracing ? 100% @ 9-12 months 100% @ 9-12 months

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MCL INJURIES HISTORY HISTORY Mechanism = valgus stress Mechanism = valgus stress Medial joint line pain Medial joint line pain Lack of large effusion Lack of large effusion Difficulty weight-bearing Difficulty weight-bearing

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MCL INJURIES Treatment Of Grade 1 &2 Treatment Of Grade 1 &2 Early mobilization Early mobilization Weight-bearing as tolerated Weight-bearing as tolerated Hinged knee brace Hinged knee brace PRICES PRICES Recovery 4-6 weeks Recovery 4-6 weeks

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PCL INJURIES Mechanism Mechanism Sports = fall on flexed knee with foot plantarflexed, hyperextension, pivot Sports = fall on flexed knee with foot plantarflexed, hyperextension, pivot MVA = dashboard injury MVA = dashboard injury Effusion (less than with ACL) Effusion (less than with ACL) Shifting/instability (chronic) Shifting/instability (chronic) Less distinctive Less distinctive

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XRAYS AP AP Lateral Lateral Tangential Tangential

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KNEE- LATERAL XRAYS Patella Patella Fat pads/ bursae Fat pads/ bursae Evaluate avulsion fx Evaluate avulsion fx

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KNEE- TANGENTIAL XRAYS Assess patellofemoral joint Assess patellofemoral joint Patellar tilt Patellar tilt Lateralization Lateralization Depth of trochlear Depth of trochlear groove groove

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LATERALIZATION AND TILT

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PATELLAR INSTABILITY Acute patellar dislocation Acute patellar dislocation Acute patellar subluxation Acute patellar subluxation Patellar tracking dysfunction Patellar tracking dysfunction

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PATELLAR DISLOCATION History Mechanism = pivot Mechanism = pivot Immediate effusion Immediate effusion May visualize patella dislocated laterally May visualize patella dislocated laterally + Instability (chronically) + Instability (chronically) N.B. Patella spontaneously relocates

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BIOLOGY OF THE MENISCUS Medial Meniscus Medial Meniscus Semilunar Semilunar Narrow anteriorly Narrow anteriorly Adherent to MCL Adherent to MCL Lateral Meniscus Lateral Meniscus Circular Circular Covers more of tibia Covers more of tibia Uniform size Uniform size Less adherent Less adherent

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TYPES OF MENISCUS TEARS Longitudinal Longitudinal Horizontal Horizontal Oblique Oblique Radial Radial

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MENISCAL INJURIES HISTORY Mechanism = pivot, twist Mechanism = pivot, twist + heard a pop + heard a pop - locking, instability - locking, instability Effusion 12-36 hours later Effusion 12-36 hours later

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MENISCAL INJURIES PHYSICAL EXAM Joint line tenderness Joint line tenderness IR/ER IR/ER Decreased ROM Decreased ROM McMurrays test McMurrays test Apleys compression test Apleys compression test

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ASSORTED KNEE PROBLEMS Osgood-Schlatter Syndrome Osgood-Schlatter Syndrome Patellar, Quad Tendinitis Patellar, Quad Tendinitis Plica Plica Iliotibial Band Syndrome Iliotibial Band Syndrome

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TENDINITIS QUADRICEPS AND PATELLAR History History Pain with: Pain with: Jumping Jumping Stairs Stairs Prolonged sitting Prolonged sitting Mechanism = overuse Mechanism = overuse

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TENDINITIS QUADRICEPS AND PATELLAR Physical Exam Physical Exam Tender superior/inferior pole of patella Tender superior/inferior pole of patella Tender tibial tubercle Tender tibial tubercle Tight hams, Achilles, quads Tight hams, Achilles, quads Pain with resisted action of muscle Pain with resisted action of muscle

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TENDINITIS QUADRICEPS AND PATELLAR Treatment P: protection, pain meds R: rest I: ice C: compression E: elevation S: support, strength/stretch exercises

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BURSITIS Treatment Treatment NSAIDs NSAIDs Ice Ice Flexibility exercises Flexibility exercises Steroid injections Steroid injections Surgery for chronic cases (prepatellar) Surgery for chronic cases (prepatellar)